His first law, also known as the law of inertia, describes how objects resist changes in their state of motion.

他的第一定律，也称为惯性定律，描述了物体如何抵抗其运动状态的变化。

That is because of the law of inertia.

那是因为惯性定律。

This law is also called the law of inertia—since inertia is the tendency of an object to keep doing what it's doing.

这条定律被称为惯性定律——因为惯性是物体保持原有状态的一种趋势。

If the laws of inertia are to be sought anywhere with certainty, it is in the feminine mind.

如果要在任何地方确定地寻找惯性定律， 那就是在女性的头脑中。

Beyond lay Russia, and there an older, perhaps a surer, power, resting on the eternal law of inertia, held its own.

远处是俄罗斯， 那里有一个更古老的、也许更可靠的力量， 它建立在永恒的惯性法则之上， 拥有自己的力量。